CN102585487A - Dedicated preparation device and preparation method of nano-zinc-oxide polyurethane rubber master batch - Google Patents
Dedicated preparation device and preparation method of nano-zinc-oxide polyurethane rubber master batch Download PDFInfo
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- CN102585487A CN102585487A CN2011104606587A CN201110460658A CN102585487A CN 102585487 A CN102585487 A CN 102585487A CN 2011104606587 A CN2011104606587 A CN 2011104606587A CN 201110460658 A CN201110460658 A CN 201110460658A CN 102585487 A CN102585487 A CN 102585487A
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Abstract
The invention discloses a dedicated preparation device and preparation method of a nano-zinc-oxide polyurethane rubber master batch. The method comprises the steps of: spraying a zinc oxide precursor in a reactor to the surface of a cryostat with a rotating speed being 65-90r/min and the temperature being -20 to -5 DEG C at a speed of 2-3.5kg/h so as to form nano zinc oxide; simultaneously spraying an atomization dispersing agent to the surface of the cryostat through an atomization disperser; scraping the nano zinc oxide on the surface of the cryostat into a collector containing polyurethane rubber emulsion through a scraper at the moment; stirring and mixing so as to obtain nano-zinc-oxide polyurethane rubber emulsion; and introducing the nano zinc oxide polyurethane rubber emulsion into a reserve tank of a spray dryer for spray drying so as to obtain the polyurethane rubber master batch. According to the nano zinc oxide disclosed by the invention, the nano size of the nano zinc oxide can be controlled; the conglomeration problem of the nano zinc oxide is solved; and the application field of the nano zinc oxide is widened.
Description
(1) technical field
The present invention relates to a kind of isolated plant and preparation method who prepares nano zine oxide urethanes master batch, particularly a kind of nano zine oxide rubber master batch and preparation thereof and application.
(2) background technology
Nano zine oxide and other nano-oxide all exist particle diameter little, and specific surface area is big, are prone to the general character of reunion, and this characteristic brings difficulty for the production and the application of nano-oxide.In order to address this problem, scholars carry out extensive studies, and the method that solution nano-oxide commonly used is reunited has:
1) utilizes titanic acid ester, silane coupling agent etc. that nano zine oxide is carried out surface modification, the oleophilicity of nano oxidized zinc surface is improved, thereby strengthen its dispersiveness in organic substrates such as rubber;
2) utilize macromolecular material clad nano zinc oxide such as PVP, be prepared into the microcapsule of nano-oxide.
Yet realize the scale prodn nano zine oxide, aforesaid method has certain limitation.The core technology of scale prodn nano zine oxide is the agglomeration traits that solves nano zine oxide.
(3) summary of the invention
The object of the invention provides a kind of nano zine oxide rubber master batch and preparation thereof and uses; The present invention is at patent " a kind of reaction unit and method for preparing nano zine oxide " (application number: 201110078476.3) on the basis post-processing stages of chemical crystal seed gas phase chilling precipitation from homogeneous solution novel process is furtherd investigate; Absorbed the advantage of nano zine oxide surface-treated the whole bag of tricks; The characteristics of combining nano zinc oxide scale prodn create a kind of technology for preparing the nano zine oxide master batch.Utilize this technology can prepare nano zine oxide urethanes master batch, the nano zine oxide stable existence is in urethanes, and is easy to use, satisfies the needs that add nano zine oxide in the General Purpose Rubber goods.
The technical scheme that the present invention adopts is:
A kind of isolated plant for preparing nano zine oxide urethanes master batch; Described device comprises that outlet is provided with nozzle and produces reactor drum, utmost point cooler system, the scoop that is used for depositing the urethanes emulsion that is provided with whisking appliance, the urethanes emulsion reservoir of nanometer zinc oxide precursor, is provided with spray-dryer and the masterbatch reservoir of stocking groove; Said reactor nozzle just with the surface engagement of utmost point cooler, described utmost point cooler system by fixed support be installed in the rotatable utmost point cooler on the fixed support, the decollator that atomizes, scraper and form; Described utmost point cooler is connected with described fixed support is rotatable; Described utmost point cooler is rotatable cylindrical shell; Said barrel has the surface temperature that makes utmost point cooler to remain on-20～-5 ℃ heat-eliminating medium; Described atomizing decollator is fixed on the fixed support and is arranged in utmost point cooler top, and the nozzle of described atomizing decollator is towards utmost point cooler surface; Described scraper and utmost point cooler surface engagement; Described scoop inlet is located at the below of said utmost point cooler and described scraper points of engagement; Described scoop outlet is connected with the inlet of spray-dryer; Said urethanes emulsion reservoir cooperates with the scoop inlet, and said spray-dryer outlet is connected with the masterbatch reservoir.
The preferred described heat-eliminating medium in described barrel of the present invention is a liquefied ammonia.
The reactor drum of production nanometer zinc oxide precursor of the present invention is a tubular reactor, preferred Φ 200 * 1500 vitrified pipes.
It is one of following that the present invention recommends atomizing dispersion agent in the described atomizing decollator: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol; Described atomizing decollator is with the speed jet atomization dispersion agent of 50～100ml/min, and the spraying area is 20～30m
3/ min.
It is 65～90r/min that the present invention recommends the rotating speed of described utmost point cooler.
Another important goal of the invention of the present invention has provided the method for preparing nano zine oxide urethanes master batch with described isolated plant; Described method is: be-20～-5 ℃ of utmost point coolers surface formation nano zine oxides with the zinc oxide precursor in the said reactor drum with the temperature that the speed of 2～3.5kg/h is ejected into the rotation of 65～90r/min speed; Decollator atomize simultaneously to utmost point cooler surface sprinkling atomizing dispersion agent; Instant described scraper is scraped the nano zine oxide on utmost point cooler surface in the scoop that fills the urethanes emulsion; Speed with 400～450ml/min adds the urethanes emulsion in the urethanes emulsion reservoir in the scoop simultaneously; Mix, obtain nano zine oxide urethanes emulsion; Nano zine oxide urethanes emulsion is fed stocking in the groove of spray-dryer; (preferred 300～350ml/min) are ejected into the urethanes emulsion in the spray-dryer with the speed of 200～350ml/min; Dried urethanes master batch is sent into the masterbatch reservoir, and described zinc oxide precursor is the zinc oxide of particle diameter less than 1nm.
Further, said urethanes emulsion prepares as follows: with PEG 400, dimethylol propionic acid and 1, the 4-butyleneglycol is dissolved in the water fully; Be cooled to 1～5 ℃, adding ditan-4,4 '-vulcabond; React after 4～6 hours; Obtain the urethanes emulsion, isocyanate index is 1.05 in the control polyaminoester emulsion proportioning, and said isocyanate index is the mol ratio of isocyanic ester ester group and hydroxyl (or reactive hydrogen) in the urethanes emulsion.
The said atomizing decollator of recommendering folder inventive method is with the speed jet atomization dispersion agent of 50～100ml/min, is 20～30m in the spraying area of said atomizing dispersion agent
3/ min, the rotating speed of described utmost point cooler are 65～90r/min.
Further, said atomizing dispersion agent is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol.
Further again, recommending the nozzle diameter of said spray-dryer is 0.5～0.7mm, and dry air flow rates is at 30～35m
3/ h, 120～150 ℃ of temperature.
Polyoxyethylene glycol according to the invention is a molecular weight 400～600; W 166 is that molecular weight is 800～1000; The polytetrahydrofuran diol molecular weight is 1000; Polyester polyol is a hexanodioic acid 1,4-butanediol ester glycol, and molecular weight is between 1000～2000.
Concrete the present invention recommends to prepare nano zine oxide urethanes master batch with following equipment and method:
The used device of preparation nano zine oxide urethanes master batch that the present invention recommends comprise outlet be provided with nozzle produce reactor drum, the utmost point cooler system of nanometer zinc oxide precursor, be provided with whisking appliance the scoop that is used for depositing the urethanes emulsion, be provided with spray-dryer, masterbatch reservoir and the polyaminoester emulsion reservoir of stocking groove; Said reactor nozzle just with the surface engagement of utmost point cooler, described utmost point cooler system by fixed support be installed in the rotatable utmost point cooler on the fixed support, the decollator that atomizes, scraper respectively and form; Described utmost point cooler is connected with described fixed support is rotatable; Said utmost point cooler is rotatable cylindrical shell; Described barrel has the surface temperature that makes utmost point cooler to remain on-20～-5 ℃ heat-eliminating medium; The heat-eliminating medium of described barrel is a liquefied ammonia, and the rotating speed of utmost point cooler is 65～90r/min; Described atomizing decollator is fixed on the fixed support and is arranged in utmost point cooler top, and the nozzle of described atomizing decollator is towards utmost point cooler surface; Atomizing dispersion agent in the described atomizing decollator is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol, and described atomizing dispersion agent is with the speed jet atomization dispersion agent of 50～100ml/min, and the spraying area is 20～30m
3/ min; Described scraper and utmost point cooler surface engagement; The nano zine oxide that scraper can generate utmost point cooler surface immediately when guaranteeing the rotation of utmost point cooler scrapes off; Described scoop inlet is located at the below of said utmost point cooler and described scraper points of engagement; Described scoop outlet is connected with the inlet of spray-dryer; Said polyaminoester emulsion reservoir cooperates with the scoop inlet, and said spray-dryer outlet is connected with the masterbatch reservoir, and the reactor drum of described production nanometer zinc oxide precursor is a tubular reactor.
The method that described device prepares nano zine oxide urethanes master batch is recommended as: be-20～-5 ℃ of utmost point coolers surface formation nano zine oxides with the zinc oxide precursor in the said reactor drum with the temperature that the speed of 2～3.5kg/h is ejected into the rotation of 65～90r/min speed; Decollator atomize simultaneously to utmost point cooler surface sprinkling atomizing dispersion agent; Described atomizing dispersion agent is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol; The atomizing decollator is with the speed jet atomization dispersion agent of 50～100ml/min, and the spraying area of said atomizing dispersion agent is 20～30m
3/ min; The rotating speed of described utmost point cooler is 65～90r/mi; Immediately generate nano zine oxide on utmost point cooler surface, described scraper is scraped the nano zine oxide on utmost point cooler surface in the scoop that fills the urethanes emulsion, and the speed with 400～450ml/min joins the urethanes emulsion in the polyaminoester emulsion reservoir in the scoop simultaneously; Mix, obtain nano zine oxide urethanes emulsion; Nano zine oxide urethanes emulsion is fed stocking in the groove of spray-dryer; (preferred 300～350ml/min) are ejected into the urethanes emulsion in the spray-dryer with the speed of 200～350ml/min; The nozzle diameter of said spray-dryer is 0.5～0.7mm, and dry air flow rates is at 30～35m
3/ h, 120～150 ℃ of temperature; Dried urethanes master batch is sent into the masterbatch reservoir, and described zinc oxide precursor is less than 1nm zinc oxide.
Said urethanes emulsion prepares as follows: with PEG 400, dimethylol propionic acid and 1; The 4-butyleneglycol is dissolved in the water fully, is cooled to 1～5 ℃, adds ditan-4; 4 '-vulcabond; React after 4～6 hours, obtain the urethanes emulsion, isocyanate index is 1.05 in the control polyaminoester emulsion proportioning.
Zinc oxide precursor according to the invention is meant the zinc oxide of particle diameter less than 1nm, and preparation process of precursor is seen patent " a kind of reaction unit and method for preparing nano zine oxide ", application number: 201110078476.3.
At zinc oxide precursor and jet atomization dispersion agent when heat-eliminating medium contacts; Nano zine oxide is scraped by scraper then; Get in the urethanes emulsion, under intensive stirred, nano zine oxide was dispersed in the emulsion of urethanes; Emulsion is spraying drying again, and preparation contains the urethanes master batch of nano zine oxide.The urethanes master batch of this nano zine oxide can be used for common rubber item, has thoroughly solved the scattering problem of nano zine oxide in rubber.
Compared with prior art, beneficial effect of the present invention is mainly reflected in:
1) nano zine oxide utilizes macromolecule dispersing agent to carry out surface treatment when producing, and makes the nano-scale of nano zine oxide be able to control;
2) nano zine oxide carries out the second time and disperses in the urethanes emulsion, and fixedly nano zine oxide have an environment, make the nano zine oxide stable existence, solved the agglomeration traits of nano zine oxide;
3) preparation of nano zine oxide urethanes master batch and use make nano zine oxide in rubber, disperse to be guaranteed, and the use of nano zine oxide and common other auxiliary agents are as broad as long, and this method can be expanded the Application Areas of nano zine oxide.
(4) description of drawings
Fig. 1 nano zine oxide urethanes master batch preparation technology schema; Wherein 1-reactor drum, 2-utmost point cooler system, the 3-scoop that is used for depositing the urethanes emulsion, the 4-that are provided with whisking appliance is provided with spray-dryer, the 5-masterbatch reservoir of stocking groove, 6-utmost point cooler, 7-atomizing decollator, 8-scraper, 9-polyaminoester emulsion reservoir.
(5) embodiment
Below in conjunction with specific embodiment the present invention is described further, but protection scope of the present invention is not limited in this:
Embodiment 1: the used device of preparation nano zine oxide urethanes master batch
The used device of preparation nano zine oxide urethanes master batch comprises that outlet is provided with nozzle and produces reactor drum 1, utmost point cooler system 2, the scoop 3 that is used for depositing the urethanes emulsion that is provided with whisking appliance, the polyaminoester emulsion reservoir 9 that cooperates with scoop 3 of nanometer zinc oxide precursor, is provided with spray-dryer 4 and the masterbatch reservoir 5 of stocking groove; Said reactor drum 1 nozzle just with the surface engagement of utmost point cooler 6, described utmost point cooler system 2 by fixed support be installed in the rotatable utmost point cooler 6 on the fixed support, the decollator 7 that atomizes, scraper 8 respectively and form; Described utmost point cooler 6 is connected with described fixed support is rotatable; Said utmost point cooler 6 is rotatable cylindrical shell; Described barrel has the surface temperature that makes utmost point cooler to remain on-20～-5 ℃ heat-eliminating medium; The heat-eliminating medium of described barrel is a liquefied ammonia, and the rotating speed of utmost point cooler 6 can be made as 65～90r/min; Described atomizing decollator 7 is fixed on the fixed support and is arranged in utmost point cooler 6 tops, and the nozzle of described atomizing decollator 7 is towards utmost point cooler 6 surfaces; Atomizing dispersion agent in the described atomizing decollator 7 is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol; Described atomizing dispersion agent can be made as the speed jet atomization dispersion agent with 50～100ml/min, and the spraying area is 20～30m
3/ min; Described scraper 8 and utmost point cooler 6 surface engagement; The nano zine oxide that scraper can generate utmost point cooler surface immediately when guaranteeing the rotation of utmost point cooler scrapes off; Described scoop 3 inlets are located at the below of said utmost point cooler 6 and described scraper 8 points of engagement; Described scoop 3 outlets are connected with the inlet of spray-dryer 4; Said polyaminoester emulsion reservoir 9 cooperates with scoop 3 inlets, and said spray-dryer 4 outlets are connected with masterbatch reservoir 5, and the reactor drum 1 of described production nanometer zinc oxide precursor is a tubular reactor.
Adopt the equipment of embodiment 1:
The preparation of urethanes emulsion: taking polyethylene glycol (molecular weight 400) 10kg, dimethylol propionic acid 1.34kg, 1; 4-butyleneglycol 1.8kg, the water of 200kg is back to each component at 80 ℃ and dissolves fully; Be cooled to 5 ℃, add the MDI of 28.875kg, then stirring reaction 6h; Obtain urethanes emulsion 242kg, isocyanate index is 1.05 in the control polyaminoester emulsion proportioning, and is subsequent use.
Heat-eliminating medium in the utmost point cooler (liquid nitrogen) is cooled to-20 ℃; Be injected on the utmost point cooler surface (utmost point cooler is with the rotation of 75r/min speed) with the speed of the 3kg/h precursor (particle diameter is less than 1nm) with nano zine oxide in the reactor drum, (the spraying area is 20m to the decollator that atomizes simultaneously to utmost point cooler jet surface dispersion agent polyoxyethylene glycol with 100ml/min speed
3/ min); Form nano zine oxide; Instant described scraper is scraped the nano zine oxide on utmost point cooler surface in the scoop that fills the urethanes emulsion; Scoop constantly adds to the urethanes emulsion in the scoop from urethanes emulsion reservoir with the 400ml/min flow simultaneously, mixes, and obtains nano zine oxide urethanes emulsion; Utilize pulse pump to squeeze into spray-dired stocking in the groove nano zine oxide urethanes emulsion; With 300ml/min speed nano zine oxide urethanes emulsion (having disperseed nano zine oxide) is ejected into that (nozzle diameter of spray-dryer is 0.5mm, and dry air flow rates is at 35m in the spray-dryer
3/ h, 120 ℃ of temperature), dried nano zine oxide urethanes masterbatch is sent in the masterbatch reservoir with hot blast, and is subsequent use.
Heat-eliminating medium (liquid nitrogen) is cooled to-10 ℃; Be injected on utmost point cooler (utmost point cooler is with the rotation of the 80r/min speed) surface with the speed of the 2kg/h precursor with nano zine oxide, (the spraying area is 25m to the decollator that atomizes simultaneously with 80ml/min speed jet spread agent W 166
3/ min); Form nano zine oxide; Instant described scraper scrapes the nano zine oxide on utmost point cooler surface in the scoop that fills the urethanes emulsion; Scoop constantly adds to the urethanes emulsion of embodiment 2 methods preparation in the scoop from urethanes emulsion reservoir with the 400ml/min flow simultaneously, mixes, and utilizes pulse pump to squeeze into spray-dired stocking in the groove nano-polyurethane rubber latex that mixes; With 200ml/min speed nano-polyurethane rubber latex (having disperseed nano zine oxide) is ejected into that (nozzle diameter of spray-dryer is 0.6mm, and dry air flow rates is at 35m in the spray-dryer
3/ h, 140 ℃ of temperature), dried nano zine oxide urethanes masterbatch is sent in the masterbatch reservoir with hot blast, and is subsequent use.
Embodiment 4
Heat-eliminating medium (liquid nitrogen) is cooled to-15 ℃; Be injected on utmost point cooler (this utmost point cooler is with the rotation of the 90r/min speed) surface with the speed of the 3.5kg/h precursor with nano zine oxide, (the spraying area is 30m to the decollator that atomizes simultaneously with 70ml/min speed jet spread agent polytetrahydrofuran diol
3/ min); Form nano zine oxide; Instant described scraper scrapes the nano zine oxide on the utmost point cooler in the scoop that fills the urethanes emulsion; Scoop constantly adds to the urethanes emulsion of the preparation of embodiment 2 methods in the urethanes emulsion reservoir in the scoop with the 450ml/min flow simultaneously, mixes, and the nano-polyurethane rubber latex that mixes utilizes pulse pump to squeeze into spray-dired stocking in the groove; With 340ml/min speed nano-polyurethane rubber latex (having disperseed nano zine oxide) is ejected into that (nozzle diameter of spray-dryer is 0.7mm, and dry air flow rates is at 35m in the spray-dryer
3/ h, 130 ℃ of temperature), dried nano zine oxide urethanes masterbatch is sent in the masterbatch reservoir with hot blast, and is subsequent use.
Heat-eliminating medium (liquid nitrogen) is cooled to-5 ℃; Be injected on utmost point cooler (this utmost point cooler is with the rotation of the 65r/min speed) surface with the speed of the 2.5kg/h precursor with nano zine oxide, (the spraying area is 27m to the decollator that atomizes simultaneously with 50ml/min speed jet spread agent polyester polyol
3/ min); Form nano zine oxide; Instant described scraper scrapes the nano zine oxide on the utmost point cooler in the scoop that fills the urethanes emulsion; Scoop constantly adds to the urethanes emulsion of embodiment 2 methods preparation in the urethanes emulsion reservoir in the scoop with the 450ml/min flow simultaneously, mixes, and the nano-polyurethane rubber latex that mixes utilizes pulse pump to squeeze into spray-dired stocking in the groove; With 350ml/min speed nano-polyurethane rubber latex (having disperseed nano zine oxide) is ejected into that (nozzle diameter of spray-dryer is 0.6mm, and dry air flow rates is at 35m in the spray-dryer
3/ h, 150 ℃ of temperature), dried nano zine oxide urethanes masterbatch is sent in the masterbatch reservoir with hot blast, and is subsequent use.
Claims (10)
1. isolated plant for preparing nano zine oxide urethanes master batch; It is characterized in that described device comprises that outlet is provided with nozzle and produces reactor drum, utmost point cooler system, the scoop that is used for depositing the urethanes emulsion that is provided with whisking appliance, the urethanes emulsion reservoir of nanometer zinc oxide precursor, is provided with spray-dryer and the masterbatch reservoir of stocking groove; Said reactor nozzle just with the surface engagement of utmost point cooler, described utmost point cooler system by fixed support be installed in the utmost point cooler on the fixed support, the decollator that atomizes, scraper respectively and form; Described utmost point cooler is connected with described fixed support is rotatable; Described utmost point cooler is rotatable cylindrical shell; Said barrel has the surface temperature that makes utmost point cooler to remain on-20～-5 ℃ heat-eliminating medium; Described atomizing decollator is fixed on the fixed support and is arranged in utmost point cooler top, and the nozzle of described atomizing decollator is towards utmost point cooler surface; Described scraper and utmost point cooler surface engagement; Described scoop inlet is located at the below of said utmost point cooler and described scraper points of engagement; Described scoop outlet is connected with the inlet of spray-dryer; Said urethanes emulsion reservoir cooperates with the scoop inlet, and said spray-dryer outlet is connected with the masterbatch reservoir.
2. the isolated plant of nano zine oxide urethanes master batch as claimed in claim 1 is characterized in that described heat-eliminating medium is a liquid nitrogen.
3. the isolated plant of nano zine oxide urethanes master batch as claimed in claim 1, the reactor drum that it is characterized in that described production nanometer zinc oxide precursor is a tubular reactor.
4. the isolated plant of nano zine oxide urethanes master batch as claimed in claim 1; It is characterized in that atomizing dispersion agent in the described atomizing decollator is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol; Described atomizing dispersion agent is with the speed jet atomization dispersion agent of 50～100ml/min, and the spraying area is 20～30m
3/ min.
5. the isolated plant of nano zine oxide urethanes master batch as claimed in claim 1, the rotating speed that it is characterized in that described utmost point cooler is 65～90r/min.
6. method for preparing nano zine oxide urethanes master batch with the described device of claim 1; It is characterized in that described method is: be-20～-5 ℃ of utmost point coolers surface formation nano zine oxides with the zinc oxide precursor in the said reactor drum with the temperature that the speed of 2～3.5kg/h is ejected into the rotation of 65～90r/min speed; Decollator atomize simultaneously to utmost point cooler surface sprinkling atomizing dispersion agent; Instant described scraper is scraped the nano zine oxide on utmost point cooler surface in the scoop that fills the urethanes emulsion; Speed with 400～450ml/min joins the urethanes emulsion in the polyaminoester emulsion reservoir in the scoop simultaneously; Mix, obtain nano zine oxide urethanes emulsion; Nano zine oxide urethanes emulsion is fed stocking in the groove of spray-dryer; Speed with 200～350ml/min is ejected into the urethanes emulsion in the spray-dryer; Dried urethanes master batch is sent into the masterbatch reservoir, and described zinc oxide precursor is the zinc oxide of particle diameter less than 1nm.
7. the preparation method of nano zine oxide urethanes master batch as claimed in claim 6, it is characterized in that said urethanes emulsion prepares as follows: with PEG 400, dimethylol propionic acid and 1, the 4-butyleneglycol is dissolved in the water fully; Be cooled to 1～5 ℃; Adding ditan-4,4 '-vulcabond, react after 4～6 hours; Obtain the urethanes emulsion, isocyanate index is 1.05 in the control polyaminoester emulsion proportioning.
8. the preparation method of nano zine oxide urethanes master batch as claimed in claim 6 is characterized in that the speed jet atomization dispersion agent of said atomizing decollator with 50～100ml/min, and the spraying area of said atomizing dispersion agent is 20～30m
3/ min, the rotating speed of described utmost point cooler are 65～90r/min.
9. the preparation method of nano zine oxide urethanes master batch as claimed in claim 6 is characterized in that said atomizing dispersion agent is one of following: polyoxyethylene glycol, W 166, polytetrahydrofuran diol or polyester polyol.
10. the preparation method of nano zine oxide urethanes master batch as claimed in claim 6 is characterized in that the nozzle diameter of said spray-dryer is 0.5～0.7mm, and dry air flow rates is at 30～35m
3/ h, 120～150 ℃ of temperature.
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| CN110181704A (en) * | 2019-04-29 | 2019-08-30 | 广东广荣纳米科技集团有限公司 | Wet process refines powdered rubber production line and preparation method thereof |
| CN110181704B (en) * | 2019-04-29 | 2024-04-19 | 林焕 | Production line for wet refining of powdered rubber and preparation method thereof |
| CN111995946A (en) * | 2020-08-26 | 2020-11-27 | 成都新柯力化工科技有限公司 | Polyurethane root-resistant waterproof coating and preparation method thereof |
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